Apparatus for peening packing rings



Feb. 13, 1923. r 1,445,150 E. T MANNING APPARATUS FOR PEENING PACKING RINGS Filed May 14, 1919 I overcome the above mentioned defectsyand Patented Feb. 13, 1923.

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EDWARD T. MANNING, or NEW LoNnoN, CONNECTICUT.

APPARATUS FOR'PEENING PACKING RING-S.

Application filed. May 14, 1919. Serial No. 297,118.

This invention relates to apparatus for peening piston packing-rings, for rejuvenating old piston rings or vimparting to new rings a sufficient tension for yieldably.

holding them in contact with the cylinder orthe piston as the case may be. Here tofore, this tensioning hasbeen accome plished by striking caused to exertan expansive-influence upon the piston ring. This peening has been accomplished by imparting successive peening blows to the face of the piston, one at a time, progressively around the piston ring.

In imparting these peening blows one at a time, there is imparted an unequal elastic-- ity to the piston ring which causes the lat ter to warp so that it isimpossible to impart thereto an equal amount of tension throughout its wholev circumference; Furthermore the process involving the successive peening blows consumes a great deal of time andis therefore very costly. p

The object of the present inventionis to to provide an apparatus and process by means of which the whole'circumferenc'e of the piston ring may be peened simulta: neously and uniformly throughout, thereby thereof may be made without departing from the scope of the invention as claimed.

In the accompanying drawing, showing by way of example, one of many possible forms of apparatus by which the newprocess may be performed,-

successive pe'ening. blows against the face ofthe piston ringsothat the metal will be there compressed and Figure 1 is a plan of the apparatus;

Fig. 2 is a central vertical sectional view partly in elevation of the apparatus showing the parts thereof in one position;

Fig. 3 is-a fragmentary vertical sectional view showing the parts in'a different position; and

Fig. 4 is a plan of the parts shown in Fig. 8.

' The new press. p v i a The foundation part of the apparatus comprises abolster plate 5, adapted to rest upon the bed of the drop press, and provided with the bolt holes 6 by means of apparatus is intendedto be used a .with an ordinary board or drop press, and is adapted to rest uponthe bed of such the bed. The bolster plate is provided with a central opening 8, countersunk at its up-I per part, and'surroundedby a plurality of radial upwardly opening recesses -9, each.

of raised radial guide lugs 12, spaced from,

and sin-rounded by a raised annular seat 13 adapted to receive a piston-packing ring 14 thereon. Surrounding the annular seat there is-provided a "heavy annular bolster flange 15 concentric and spaced from said ring; seat and forming with-the ringseatan anvil receivingrec'ess adaptedto receive an annular anvil 18v o'fhardened steel.

Disposed between and; guided by said lugs respectively. are a pluralityof radially disposed radially. movable approximately sector-shaped peening members '20 provided wvhich the bolster plate may be secured'to with concaved inner end faces 21, together forming a downwardly tapering opening.

Said peening members are provided with iarcuate outer ends having a largenumberv of :vertically disposed, closely adjacent.

peeniug. project-ions or teeth 22, adaptedto] contact with the packinglrin'g 14 placed 'upon the seat 13 and supported against outward movement by the anvil 18.

The PGBIllIlg. members 20. are provided with radial recesses 26 havlng end shoulders 27. The recesses 9 and 26 register with 1 each other and form, housings in which are compressed helical springs 29 adapted to hold said peening members in a normal midposition with the teeth 22 out .of contact with the packingring. The annular re .taining plate 30, secured to the lugs 12 by means of the screws 31, holds the peening members between the lugs. I

The means for driving the peening members outwardly so that the teeth come into peening contact with the piston ring comprises a tapering plunger hammer 32 which itself comprises, or is mounted on,- the plunger of the drop press. This plunger hammer is provided with a tapering body porition 33, adapted to engage in said downwardly tapering recess formed by the' concaved faces 21; The lower reduced end ofthe plui'iger'hammer is guided'in the central opening- 8.

In operation, the plunger 32 is raised to its upperlimit', and a new or an old packing ring 14 is placed upon the raised seat 18, substantially in contact with the'anvil 18. The plunger is then released and drops with great force; forcing the taperingbody portion33'into the tapering opening; thereby iorcing the p eening members radially outwardly until the teethengage and indent the'pistonringandexert an intense peening action throughout the whole of its inner circumference, thereb'yevenly and thoroughly compressing and tensioning the inner faceof the ring throughout. The plunger is then aga'ln'raised and another piston ring put in'place ready to be peene'd and the operation is'repeated until all of the rings are peened: 1

Obviously the" invention is not limited to processes or apparatus for p'eening the inner face-ofthe piston rings, noris it. limited to piston rings.

Iclaim' aS'nly invention: I

1. In combination; a'b olster; sector shaped peening" members gnidedon said bolster and having'their inner ends together adapted to form a"central opening; a" retaining plate dispose'dabove' said members and holding said members in place; an annular anvil surrounding said imembers, and a tapering plunger adaptedto'engage in said opening to force said' members outwardly.

2:" In combination; a bolster plate" prof vided' with, a plurality of raised substan' tially radial elongated guide lugs; an-an nu'lar anvil surrounding said plurality of lugs; sector shaped p'eening members guided between sald lugs; andprovided with concaved" inner end faces together adapted to form a downwardlytapermg opening, and

arcuate outer ends having peening teeth; an annular retaining plate disposed on and secured to the top face or said lugs and guiding and holding saidpeening members in placebetween the lugs; and t p ri plunger adapted to engage insaid tapering opening to force said members outwardly.

In combination, abolster provided with a plurality of raised substantially radial elongated guide lugs; an anvilsurrou'nding with plurality ofsubstantiallyradial'up wardly opening recesses having end? shbul ders; an annular anvil surrounding said plurality of recesses and spaced from the outer ends thereof; a' plurality of radially disposed radially movable approximately sector-shaped peening members disposed within said anvil and provided with concaved inner end facestogether adapted" to: form adownwardly'tapering opening, arcu ate outer ends having peeningteeth thereon,

and radial recesses approximately register ing with said upwardly opening recesses-and provided with end shoulders; heli'cal'sp'rings' compressed in said recesses and engaging said shoulders; and atapering plunger hammer adapted to'eng'age in said" opening'to force said members outwardly,

7. In combination, a bolster; a raised ring-seat thereon; an annular anvil surrounding said seat; peening members with in and limited in outward movement by said seat;and means adaptedto foroes'aid 105 members outwardly.

8. In combination, a" bolster having a flange; a hardened annular anvil'removab'ly mounted on said bolster within" said' flange;

peening members; an'd means adaptedto force said members toward said' anvil. I

9. In combination-, a'b'olster provided with" a raised ring-seat, and an annular bolster" flange surrounding and spaced itrom saidseat, forming therewith an anvil recess an anvil in said recess; 'peenin'g member s"withs" in said seat; and'mean's adapted to' engage and force said members outwardly.

10. in combination; a bolster provided with a raised ring seat, and. an" annular bolster flange surrounding anitlspaced from" said seat forming therewith ananvil recess; a hardened annular anvil 'removably mount ed in'said anvil-recess; peening members radially movable "within said seat" and pro vided with innerend faces" together adapted to form an openingandi arcuat'e' outer'ends having peening teeth; and a tapering plunger hammer adapted to engage'in' said opening to force said members outwardly.

11. In combination, a bolster provided with an opening; an anvil on said bolster; peening members; and means adapted to move into and be guided by said opening, and to force said members toward said anvil.

12. In combination, a bolster provided with a central opening counter-sunk at its upper part, an anvil surrounding said opening; peening members guided round said opening and provided with concaved inner end faces together adapted to form, a downwardly tapering opening; and a tapering plunger hammer having a reduced end adapted to engage in said central opening, and a tapering body portion adapted to engage in said counter-sunk upper part and in said taperinir opening, and to force said peening mem bers outwardly.

18. fn combination, a bolster plate provided with a central opening, a plurality of substantially radial recesses around said opening, a plurality of elongated guide lugs between said radial recesses, a raised annular ring seat surrounding said recesses and,

adapted to receive a packing ring thereon; an annular bolster flange surroundlng said seat thereby forming an anvil recess; an ancal springs comprised in, said recesses; means secured'to said lugs and guiding said peening members in place;and a tapering plunger hammer having a tapering body portion adapted to engage in said tapering opening to force the peening membersoutwardly to cause the peening teeth to have peening engagement withthe inner face of the piston ring.

14. In combination, a substantially annuQ lar anvil; guldes fixed relative to the anvil;

and peening members guided between said guides toward the anvll and together provldmg a substantially annular peemng portion.

15. In combination, fixed guides; a onetween said guides toward the anvil and havf ing peening teeth providing a substantially annular peemng portion opposing said unbroken face.

17. In combination fixed guides; an anvil of fixed substantially annular contour; and peening members guided between said guides toward the anvil and together providing a substantially annular peening portion.

EDWARD T. MANNING.

Witnesses:

H. M; KILPATRI K, W. D. PENNEY. 

